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Abstract Viscosity is an important process variable that should be monitored and controlled to ensure the consistent and reliable production of graphite‐fiber‐reinforced composite parts by the autoclave/vacuum bag process. Unfortunately, no technique is currently known for the direct measurement of viscosity in this p…
Structural work on the three modifications of sodium hydroxide is reviewed. The monoclinic and cubic modifications were determined with neutron and X-ray diffraction, respectively. The phase-transition temperatures were determined by specific-heat measurements. The cubic to monoclinic transition is a first-order trans…
Abstract A mathematical model has been developed for the direct, continuous esterification process. Influence of process and operational variables, including temperature distribution, residence time distribution, bis(hydroxyethyl)terephthalate recycle, pressure, and ethylene glycol (EG) to terephthalic acid ratio on t…
Celanese PBI is a derivatized polybenzimidazole fiber possessing a unique balance of properties that permit it to meet critical cost/performance criteria in demanding environments. The fiber, a modification of previously documented earlier versions, has excellent textile, tactile, thermal, and chemical resistance prop…
Abstract A wide variety of inorganic fillers are produced for the rubber industry. The most important are the clays, precipitated silicas and silicates, and the ground and precipitated calcium carbonates. The silicas and silicates provide the broadest particle size range falling into the carbon black range from FEF (N…
A technique, Photon Activation Therapy (PAT), is described in which high Linear Energy Transfer (LET) radiations in the form of Auger electron distributions are generated by a photon beam through photoactivation of stable iodine incorporated as an analog of thymidine (Tyd) in DNA. Of the several halogenated deoxyribon…
Abstract The postcondensation of nylon 6 in the solid state was studied. The reactions were carried out on fine powder in a fluidized bed reactor in a stream of dry nitrogen in the temperature range 110–205°C and during 1–24 h. The solid‐state polymerization (SSP) did not follow melt kinetics, but was found to be limi…
Results are presented on the discovery of plasma bubble domains (PBD’s), which occur as regular patterns of localized glow discharges formed under ac excitation in an atmospheric pressure inert gas based mixture confined between large-area, closely spaced, plane-parallel, dielectric-covered electrodes. These plasma bu…
The fully enclosed nature of gas- insulated substations substantially increases the difficulty of testing, maintaining, and troubleshooting the switchgear. Under EPRI sponsorship, Ontario Hydro has developed systems for fault location in gas cables and partial discharge location for cables and substations.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTS to O and O to S linkage isomerization in sulfoxide complexes of pentaamminerutheniumA. Yeh, N. Scott, and H. TaubeCite this: Inorg. Chem. 1982, 21, 7, 2542–2545Publication Date (Print):July 1, 1982Publication History Published online1 May 2002Published inissue 1 July 1982h…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDrastic fluorescence enhancement of cyanine dyes bound to synthetic bilayer membranes. Its high sensitivity to the chemical structure and the physical state of the membraneN. Nakashima and T. KunitakeCite this: J. Am. Chem. Soc. 1982, 104, 15, 4261–4262Publication Date (Prin…
Several iron-binding pigments (siderochromes) produced by Pseudomonas fluorescens have been isolated and partially characterized. They include ferribactin and various forms of pyoverdine, as well as some previously unreported compounds. In particular, the existence of ferribactin has been independently confirmed for t…
Abstract Measurements were made of dynamic mechanical response spectra and stress–strain properties at room temperature on films of isotactic polypropylene and low‐density polyethylene prior and after ultraviolet irradiation in a Xenotest 450 apparatus. The period of irradiation that caused a deep deterioration of ult…
We report equipment consisting of the coupling of an electrochemical system for measurement and regulation of oxygen partial pressure (PO2) to a symmetrical thermogravimetric analysis system built on the basis of a Cahn 1000 electrobalance. The electrochemical system allows the measurement and regulation of PO2 within…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsolation, purification, and characterization of high-valent complexes from a manganese porphyrin based catalytic hydrocarbon activation system. Crystal and molecular structure of .mu.-oxo-bis[azido(tetraphenylporphinato)manganese(IV)]Bruce C. Schardt, John A. Smegal, Freder…
We have characterized the process that yields high-speed, bistable, electro-optic switching in the surface-stabilized ferroelectric liquid crystal geometry, at intermediate electric fields. Switching proceeds by a continuous reversal of ferroelectric polarization in regions away from the surfaces of the sample, follow…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation G. G. A. Böhm, J. O. Tveekrem; The Radiation Chemistry of Elastomers and Its Industrial Applications. Rubbe…
We have obtained images of the microstructure in the incommensurate and the commensurate charge-density-wave states of $2H$-Ta${\mathrm{Se}}_{2}$ with the use of superlattice dark-field electron microscopy. Large orthorhombic domains are observed in the commensurate phase. With warming to higher temperatures the incom…
Low-energy, high-resolution electron energy loss spectroscopy has been used to identify the vibrational modes of hydrogen on the semiconducting diamond surface providing the first direct evidence that the (111) 1×1 surface is terminated by hydrogen. The vibrational loss spectrum from the ’’as-polished’’ surface shows…
This article reviews developments in the understanding of X-ray-excited Auger and photoelectron spectra in the light of theoretical developments in atom, molecular and solid-state physics. After reviewing progress in XPS and AES separately emphasis is placed on the inter-relationship between the two fields: Auger rate…